Investigation of intraoperative brain deformation using a 1.5-t interventional MR system: Preliminary results

被引:160
作者
Maurer, CR
Hill, DLG
Martin, AJ
Liu, HY
McCue, M
Rueckert, D
Lloret, D
Hall, WA
Maxwell, RE
Hawkes, DJ
Truwit, CL
机构
[1] Guys Hosp, Dept Radiol Sci, London SE1 9RT, England
[2] Kings Coll London, Guys Kings & St Thomas Sch Med, Div Radiol Sci & Med Engn, London SE1 9RT, England
[3] Univ Minnesota, Dept Radiol, Minneapolis, MN 55455 USA
[4] Philips Med Syst, Best, Netherlands
[5] Univ Minnesota, Dept Neurosurg, Minneapolis, MN 55455 USA
基金
英国工程与自然科学研究理事会;
关键词
brain deformation; brain shift; image-guided surgery; intraoperative imaging; MRI; neurosurgery;
D O I
10.1109/42.736050
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
All image-guided neurosurgical systems that we are aware of assume that the head and its contents behave as a rigid body. It is important to measure intraoperative brain deformation (brain shift) to provide some indication of the application accuracy of image-guided surgical systems, and also to provide data to develop and validate nonrigid registration algorithms to correct for such deformation. We are collecting data from patients undergoing neurosurgery in a high-field (1.5 T) interventional magnetic resonance (MR) scanner. High-contrast and high-resolution gradient-echo MR image volumes are collected immediately prior to surgery, during surgery, and at the end of surgery,,vith the patient intubated and lying on the operating table in the operative position. In this paper we report initial results from six patients: one freehand biopsy, one stereotactic functional procedure, and four resections. We investigate intraoperative brain deformation by examining threshold boundary overlays and difference images and by measuring ventricular volume, We also present preliminary results obtained using a nonrigid registration algorithm to quantify deformation. We found that some cases had much greater deformation than others, and also that, regardless of the procedure, there was very little deformation of the midline, the tentorium, the hemisphere contralateral to the procedure, and ipsilateral structures except those that are within 1 cm of the lesion or are gravitationally above the Surgical site.
引用
收藏
页码:817 / 825
页数:9
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